ANNOUNCE: exo 4.21.0 released

[Gaël Bonithon]

exo 4.21.0 is now available for download from
  
  https://archive.xfce.org/src/xfce/exo/4.21/exo-4.21.0.tar.bz2
  https://archive.xfce.org/src/xfce/exo/4.21/exo-4.21.0.tar.bz2?sha1
  https://archive.xfce.org/src/xfce/exo/4.21/exo-4.21.0.tar.bz2?sha256


What is exo?
============

Exo is an Xfce library targeted at application development. It contains
various custom widgets and APIs extending the functionality of GLib and
GTK. It also ships utilities for defining preferred applications,
mounting storage devices and more.

Website: 
  https://docs.xfce.org/xfce/exo/start


Release notes for 4.21.0
========================
[Please note that this is a development release.]

exo is deprecated in favor of libxfce4ui and libxfce4util as of
development version 4.21.0. The last stable release before archiving the
repository will be 4.22.0. See
https://gitlab.xfce.org/xfce/exo/-/merge_requests/87
and the links it contains for details.

- Update copyright year
- Deprecate exo-job and exo-simple-job
- Deprecate binaries
- Deprecate exo-tree-view
- Deprecate exo-icon-chooser-dialog and friends
- Deprecate exo-gtk-extensions
- Deprecate exo-gdk-pixbuf-extensions
- Deprecate exo-execute
- I18n: Update po/LINGUAS list
- Properly check iterator before usage (#124)
- Fix code style
- exo-tree-view: Allow Ctrl+Shift+Click in single click mode
- Translation Updates:
  Albanian, Catalan, Danish, Estonian, Polish, Portuguese, Romanian,
  Russian, Slovak, Slovenian, Venetian